+/** Start the "Passive observation of Failure" algorithm for all
+ * records of the specified key. The specified address is */
+void avahi_cache_start_poof(AvahiCache *c, AvahiKey *key, const AvahiAddress *a);
+
+/* Stop a previously started POOF algorithm for a record. (Used for response suppresions records */
+void avahi_cache_stop_poof(AvahiCache *c, AvahiRecord *record, const AvahiAddress *a);
+